Patterns of abundance of the sea urchin Centrostephanus rodgersii (Agassiz) on the central coast of New South Wales, Australia

Aerial photography was used to estimate the representation of shallow subtidal habitats in New South Wales. Sixty sites, each between 4 and 5 hectares, were mapped with Geographical Information Systems software using ortho-rectified images digitized from 1:8000-scale photographs and ‘ground truthed’ in the field by divers. Barrens habitat covered an estimated 50% (s.e. = 3.9) of nearshore reefs between Port Stephens and Disaster Bay. Coverage of barrens habitat was greatest in Disaster Bay (68%, s.e. = 6.7) and least south of Disaster Bay (1%, s.e. = 0.3). There were clear differences among localities in the area of reef within the mapped sites; those at Cape Howe, Nadgee, and Turingal were significantly smaller in area than all others. There was no clear latitudinal trend in these differences but there was evidence of sand inundation at a site at Nadgee, where the reef was small. Differences in the densities and size-structure of the sea urchin Centrostephanus rodgersiiat 27 of the mapped sites provide a basis for testing relationships between the demography of this species and the persistence of the barrens habitat. The extensive coverage of the barrens habitat in New South Wales is likely to limit the productivity of the abalone industry. The development of a sea urchin fishery may have large impacts on habitat representation on nearshore reefs.

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Organochlorine pesticides and hexachlorobenzene along the central coast of New South Wales: multi-scale distributions using the territorial damselfish Parma microlepis as an indicator

Environmental Pollution ◽

10.1016/s0269-7491(01)00109-9 ◽

2002 ◽

Vol 116 (2) ◽

pp. 319-335 ◽

Cited By ~ 11

Author(s):

K.A Tricklebank ◽

M.J Kingsford ◽

H.A Rose

Keyword(s):

Organochlorine Pesticides ◽

New South ◽

New South Wales ◽

Central Coast ◽

Multi Scale ◽

South Wales ◽

Territorial Damselfish

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Saccocirridae (Annelida : Archiannelida) from the central coast of New South Wales

Marine and Freshwater Research ◽

10.1071/mf9810439 ◽

1981 ◽

Vol 32 (3) ◽

pp. 439 ◽

Cited By ~ 14

Author(s):

R Brown

Keyword(s):

World Wide ◽

New South ◽

New South Wales ◽

Ventral Surface ◽

The Body ◽

Coarse Grained ◽

Pacific Region ◽

Central Coast ◽

South Wales ◽

Turbulent Water

Saccocirrids (archiannelids) were collected from coarse-grained sediments in turbulent water from the central New South Wales coast. Saccocirrus jouinae, sp. nov., and S. tridentiger, sp, nov., are described, and S. krusadensis Alikunhi, 1948 newly recorded in Australia. In these species gonads occur only on the left side of the body and cilia are found on the ventral surface. Of the 17 species attributed to the Saccocirridae, seven species are known to have unilateral gonads and ventral ciliation. They occur only in the Indo-Pacific region. Species with gonads on both sides of the body have not been described with cilia on the ventral surface. Their distribution is world-wide.

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